[sdiy] stereo synthesis

[jhaible at t-online.de]

> I just 
> wondered if it 
> would work to run 2 oscillator cores off one exponential 
> converter. 

Yes, sure. Provided you convert the output curret to
a voltage, and then back to two currents.

> And would they track close enough to stay in tune?

This depends on the rest of your circuit. Needs low
offset parts or some extra trimpots.
Look for "polysix" in the archives.

Better: Use an expo converter with two outputs (3 transistors
rather than the usual 2). (Splitting hairs, this is not a single
expo converter, because the actual expo conversion always
takes place in a single transistor.)
Even with this solution, you need either well-matched parts
or some extra trimming.
Downside: Shared expo converter might make "soft sync" isolation
difficult, and unwanted soft sync is enemy #1 against a rich sound.

JH.